Added functions modifier to submodules context and focused

common/include/upper2lower

common/include/util.hpp

common/src/util.cpp

torch_modules/include/ContextModule.hpp

torch_modules/include/FocusedColumnModule.hpp

torch_modules/include/Submodule.hpp

torch_modules/src/ContextModule.cpp

torch_modules/src/FocusedColumnModule.cpp

torch_modules/src/Submodule.cpp